Brake.



W. H. BALCH.

BRAKE. APPLICATION TILEI) MAR. 14, 1908. 916,908. Y Patented Mar. 3o, 1909. Z. ZSHBETS-SHEBT 1.

W. H. BALGH.

BRAKE.

APPLICATION FILED MAR.14, 1908.

Patented Mar. 30, 1909.

2 SHEETS-SHEET 2.

anim/wut 'm n. c. 1HE mouais firmas ca., wAsmNsw WILLIAM H. BALGH, OF PHILADELPHIA, PENNSYLVANIA.

BRAKE Specification of Letters Patent.

Patented March 30, 1909.

Application led March 14, 1908. Serial No. 421,134.

To all whom 'it 'may concern:

Be it known that I, TILLIAM H. Buien, a citizen of the United States, residing at Philadelphia, in the county of Philadelphia and State of Pennsylvania, have invented new and useful Improvements in Brakes, of which the following is a specification.

This invention relates to emergency brakes for railroad cars or the like, and. the object of the invention is to provide a device of this character comprising a toothed roller mounted in a boxing connected with the truck of a car and held normally outof contact with the railway road-bed, with a plurality of air operated plungers having yokes contacting with the outer edges of the toothed roller, the plungers being mounted in suitable casings having connection with an air cylinder connected with a source of air supply directly under the control of the engineer or other persons connected with the train.

lith these objects in view the invention resides in the novel construction and arrangement of elements, hereinafter fully described and claimed.

In the accompanying` drawings, Figure 1 is a side elevation of a portion of a car illustrating the improved brake in operative po# sition. Fig. 2 is a top plan view of the brake. Fig. 3 is a central longitudinal sectional view upon the line 3 3 of Fig. 2. Fig. 4 is a transverse sectional view through two of the plunger cylinders.

This invention is adapted to be applied to the wheeled trucks of railway cars, and is adapted to be positioned directly between the wheels of the car.

In the accompanying drawings the numeral 1 designates the boxing of the brake. This boxing, or casing 1 is provided with a pair of spaced extending portions 2, provided with suitable alining openings adapted for the reception of retaining elements by which the device is secured upon the truck. For convenience in assembling and positioning the parts the casing 1 is divided into an upper and lower section 3 and 4 respectively, secured together in any preferred or desired manner. The section 4 is provided with a suitable compartment 5 having its side walls provided with suitable spaced projections adapted to provide a way for the sliding bearings 6 in which the trunnions 7 of a toothed roller 8 are mounted for rotation. The bearings 6 have their under faces engaging helical springs 9, which are interposed between the faces and inturned portions or flanges provided by the sides of the compartment 4. These springs 9 contacting the bearings 6 tend normally to force the roller S upward within the compartment 4. The roller 8 may have its teeth 10 arranged in any preferred or desired manner, and in the construction illustrated in Fig. 4 of the drawings the roller is provided with a central row of teeth and has similar rows of teeth arranged directly to each side of and between the teeth of the center row. The outer rows of teeth 10 do not. extend to the sides of the roller 8 so as to provide a sui'licieut space for a bearing yoke 11 secured upon a plunger rod 12 connected with a plunger 13 provided in a cylinder 14 posi tioned upon the upper portion 3 of the de vice.

Interposed between the plunger 13 and the separating wall between the compartments and 4 is a helical spring 15, norinally adapted to force the plunger upward within the cylinder 14 and the yoke 11 from contacting with the roller S. A plurality of the cylinders 14, preferably four in number, are positioned upon the upper compartment 3 of the device. These cylinders 14 are each provided with plungers having helical springs which normally force them toward the upper' portion of the cylinders. The cylinders are arranoed in pairs, and the plunger rods of each pair are adapted to be secured to each end of the yokes 11, so that when pressure is exerted upon the plungers the yokes will have an even bearing face upon the ends of the face of the roller. The compartment 3 is also provided with an air receiving and distributing tank 16 positioned intermediate of the cylinders 14. This cylinder 16 is provided with pipes 17 connecting each of the cylinders 14, and is also provided with an air inlet pipe 18 communicating with a reservoir 19 or other suitable source of supply.

It will be apparent from the above description that should the ordinary brakes of a railway car fail, pressure directed within the cylinder 16 will be imparted through the pipes 17 to the cylinders 14 and will act upon the plungers 13 forcing the yokes 11 against the roller 8 and in turn forcing the roller S within its bearings 5, and against the compression of the springs 9, into engagement With the roa`d-bed which will effectively bring the car to a stop AWithout violence.

Having thus fully described the invention,

bed, and means connected directly With the' toothed Wheel for forcing the Wheel intor Contact With the road-bed.

In av brake7 a boxing, La toothed wheel mounted in bearings 'within the boxing, springs contacting the bearings to normally force the toothed Wheel `within the boxing and `out-of contact With-the'road-bed, and means connected directly With the toothed Wheel for vforcing the Wheel into contact Withi the road bed.

`3. In -a brake for cars, ya boxing secured upontl'iertruck of the car directly in the path of the `Wheel of the car, a toothed roller sli'dably mounted Within the' boxing and provided With means to normally retain it from contact vWithithe rail, of yoles normally, contacting the face of thevroller and means for forcing the yokes violently against the rollerto zforcethe roller into engagement With the rail.

(et. In a brake for railway cars, a boxing secured upon the truck of a car directly behind'thezwheel of the car, a toot-hed `Wheel mounted in slidable bearings Within the boxing, tension elements normally forcing the bearings upward Within the boxing, plun- ,gers mounted in cylinders upon the boxing, yokes connected with the plungers normally contacting the roller, springs normally forcing the plungers upward Within the casings, an air cylinder u-ponfthe boxing, pipes connecting the'air cylinder With the plunger cylinders, and a connection between the air cylinder andthe source of supply.

In testimony whereof I aflix my signature in presence oftwo witnesses.

WILLIAM H. BALCH.

Witnesses HARRY DiNuoRE, FLORA W. BALCH, 

